Chimney-top draft-regulator



(No Model.) I

B. B. LEWIS.

CHIMNEY TOP DRAFT REGULATOR.

No. 594,257. Patented Nov. 23, 1897.

I K a I I E3: 63.2 I $13 K I L I I I I I I I I la I I I I I I WiII assesI I e to 4.05%

UNITED STATES PATENT OEErcE.

BENJAMIN B. LEWIS, OF BRIDGEPORT, CONNECTICUT.

CHIMNEY-TOP DRAFT-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 594,257, dated November23, 1897.

Application filed May 27, 1896. Serial No. 593,358. (No model.)

the purpose of obtaining a better and more reliable draft for theheating apparatus connected with the same.

More specifically, my invention pertains to that class of chimney-topsterminating with a cap of stone and under which openings are left on itsseveral sides communicating with the flue or flues of the chimney and isintended to guard against the failure of draft often experienced inchimney-tops thus constructed when a strong wind is blowing directlyagainst one of its sides. Under such circumstances the momentum of theair thus driving directly against the flue opening serves to create apressure within the chimney-top, which in turn relieves itself in partby an expansion downward, thus at times reversing the natural upwarddraft of the chimney. The apparatus employed by me for this purpose isthat of a flue-opening shield having an exterior face approximately ofthe size of the flue-opening and removed to such a distance from theexterior face of the chimney as to allow the passage of smoke and gasesbetween it and the edge of the stone cap above and the side of thechimney beneath and being supported by side pieces extending into andforming side linings of the flue-opening or by some other suitable formof attached arm passing into the flueopening.

In the accompanying drawings, Figure 1 is a plan view of a chimney-topsupplied with the flue-opening shield, the cap having been removed. Fig.2 is an exterior elevation of the same with cap.

In the plan view Fig. 1, A A:A A are the elevated portions of thechimney-wall, upon which rests the chimney-cap.

O O O O are flue-openings directly beneath the chimney-cap.

D D D D are the flue-opening shields at such distance from the face ofthe chimney as to leave openings both above and beneath for the passageof smoke and gases.

E E are supporting side pieces extending within the flue-opening. Inthree of these flue-opening shields two interior flanges H H are shownand also two exterior flanges K K. The action of these flanges upon theoutward sides of the supporting-arms of the flue-opening shield is thatof holding it in a fixed position within the flue-opening. In two ofthese flue-opening shields a reversible clamp L is shown, having sidearms pivoted to the shield at the points M M. The interior ends of theside pieces E E of the shield are shown bent inward to allow of thepassage of the interior flanges H H of the shield within theflue-opening when placing it in position. In the other two of theseopenings the clamp L is shown in a reversed position to that previouslyshown, having been turned a half-revolution upon its pivoting-points MM, thus bringing it within the flue-opening and pushing outward andholding in an approximately straight line the interior parts of thesupporting side pieces E E.

When a flue-opening shield provided with the reversible clamp, as shown,and also having the interior flanges H H is to be applied to aflue-opening, the bar connecting the pivoted side arms of the clamp isvfirst turned outward toward the face of the shield, and the ends beingbent inward are thus passed within the flueopening. The bar of the clampL is then turned a half-revolution upon the pivoting-points M M, thuspushing outward and clamping securely in place the interior parts of thesupporting side pieces E E.

It is evident that the exterior shield protecting the flue-opening maybe held in place when preferred by a framework of attached metal rods orany suitable form of supporting-arms passing into the flue-opening.

What I claim is- 1. In a chimney-top, the combination of a stone cap Band a flue-opening shieldD,whose supporting sides E, E, constitute sidelinings of the flue-opening, substantially as shown.

2. In a chimney-top, the combination of a stone cap B, and aflue-opening shield D having supporting side's E, E constituting sidelinings of the flue-opening, and having interior flanges H, H,substantially as shown.

3. In a cl1imney-top, the combination of a stone cap B, and aflue-opening shield D having supporting sides E E constituting sidelinings of the flue-opening with interior flanges H, H, and exteriorflanges K, K, substantially as shown.

at. In a chimney-top the combination of a 10 stone cap 13, and aflue-opening shield D having supporting side pieces E, E, constitutingside linings of the flue-opening, having interior flanges H, H, andexterior flanges K, K, and having also a reversible clamp L,substantially as shown.

BENJAMIN B. LEWIS.

Vitnesses:

A. B. FAIRCHILD, H. W. NORCOTT.

